/*
// Licensed to Julian Hyde under one or more contributor license
// agreements. See the NOTICE file distributed with this work for
// additional information regarding copyright ownership.
//
// Julian Hyde licenses this file to you under the Apache License,
// Version 2.0 (the "License"); you may not use this file except in
// compliance with the License. You may obtain a copy of the License at:
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 */
package org.olap4j.type;

import org.olap4j.metadata.*;

/**
 * Set type.
 * 
 * @author jhyde
 * @since Feb 17, 2005
 */
public class SetType implements Type {

	private final Type elementType;

	/**
	 * Creates a type representing a set of elements of a given type.
	 * 
	 * @param elementType
	 *            The type of the elements in the set, or null if not known
	 */
	public SetType(Type elementType) {
		assert elementType instanceof MemberType || elementType instanceof TupleType;
		this.elementType = elementType;
	}

	/**
	 * Returns the type of the elements of this set.
	 * 
	 * @return element type
	 */
	public Type getElementType() {
		return elementType;
	}

	public boolean usesDimension(Dimension dimension, boolean maybe) {
		if (elementType == null) {
			return maybe;
		}
		return elementType.usesDimension(dimension, maybe);
	}

	public Dimension getDimension() {
		return elementType == null ? null : elementType.getDimension();
	}

	public Hierarchy getHierarchy() {
		return elementType == null ? null : elementType.getHierarchy();
	}

	public Level getLevel() {
		return elementType == null ? null : elementType.getLevel();
	}
}

// End SetType.java
